Tried drawing some shetland fluffy ponies because or reasons.
About ¾ the size of your regular fluffy only fluffier and twice as strong (not that you will notice anyway but…). Very quiet fluffies who mind their own business.
These are the sizes I have in my headcannon.
Left to right: Shetland fluffy - Regular fluffy - Draft fluffy
Imagine the regular fluffy to be about the size of a cocker spaniel dog
